Maxthon, originally known as MyIE2, is a free web browser for Microsoft Windows, and is also available on Android as Maxthon Mobile. The latest release, Maxthon 3, supports both the Trident and the WebKit rendering engines.^{[dead link]}

Maxthon won CNET WebWare 100 Awards in 2008 and 2009, and was #97 in PCWorld’s list of the 100 Best Products of 2011. Maxthon is the top scorer on HTML5Test.com, a website which ranks browsers on the basis of support for HTML5 standard and related specifications.

According to Maxthon International CEO Ming Jie "Jeff" Chen, Maxthon was based on MyIE, a popular modification created by Chinese programmer Changyou to customize Microsoft's Internet Explorer web browser. Changyou posted most of the source code for MyIE on his Bulletin board system before leaving the project in 2000. Chen then continued independently developing MyIE and in 2002 released a new version, MyIE2. Users around the world were quite active in contributing to MyIE2's development, adding many plugins, skins and assisting with debugging. MyIE2 was renamed Maxthon in 2003.